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New E-Mail Virus Masquerades
As Microsoft Security Update

By

Riva RichmondDow Jones Newswires

Updated Sept. 18, 2003 9:38 p.m. ET

NEW YORK -- A new Windows e-mail virus that surfaced Thursday -- which sometimes arrives as a convincing looking, but fake, security update from Microsoft Corp. -- is becoming a rising threat to home personal-computer users, according to antivirus software maker Network Associates Inc.

The company rates the virus, dubbed "Swen," a medium risk to home users due to increasing numbers of infections. It considers the virus a low risk to companies, which tend to be better a stopping new viruses because they tend to quickly...